John Curl's Blowtorch preamplifier part II

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Yes, the general populace were gifted some 20 years ago with hugely powerful machines, which they failed to appreciate, applying them to all sorts of trivial tasks like email, word processing, web surfing and watching porno etc. In the meantime, individuals like us, with a higher calling and clearly superior intellect, labored endlessly to make the machines ever more powerful until one day . . . poof, it was all swept away by a bearded magician who brought forth . . . the Tablet. Henceforth, our kind were scattered as rice grains to the wind . . .

More later ;-)
When i realized the success of Android, smart-phones and tablets, i jumped for joy. While they will be occupied to develop for Android, they gone stop to charge our softwares with megatons of crappy code and libraries, so we have a luck to keep our actual computers for years.
 
Jan,

One of the more fun psychology experiments was to give a student a deck of 50 cards with 10 sets of 5 symbols. The student then tested 20 volunteers by placing a card face down in front of the volunteer and asking them what it was. The final tally was 16 volunteers at 20%, 2 at 0% and 2 at 40%.

Now what was the purpose of the experiment?

ES
 
Jan,

One of the more fun psychology experiments was to give a student a deck of 50 cards with 10 sets of 5 symbols. The student then tested 20 volunteers by placing a card face down in front of the volunteer and asking them what it was. The final tally was 16 volunteers at 20%, 2 at 0% and 2 at 40%.

Now what was the purpose of the experiment?

ES

To show the effect of too few trials?
 
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It was jamming, right?
George

Ya mon, we be jammin..


I'll never forget loaning my mobile setup to the bassist for a reggae band one weekend. He heard my 4 K-horn and two tiger system playing a roller disco gig, and just had to use it for the concert the next two nights. My friend was a big reggae fan, and apparently this band was well known from Jamaica. Back in '78 I believe.

jn
 
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George,

What I am aiming for is less noise from the peanut gallery. John was explaining his design and methods.

Part of the noise level has had JC move on without fully exploring the subject of what happens when you have low frequency out of band signals. These do more than just add some distortion. But those issues are now apparently not going to be raised.

ES

JC is not a sweetheart either. Nor he is pushed and dragged to post here. It is his choice. It is a technical forum. The objective is technical not personal.

However even what you showed would cause a level of problem that JC tells me would be unacceptable to him.

Well, this “level of problem” is the reality. An MC or MM pre has to work with a given signal.
If the analysis of the input signal transforms it into an “unacceptable problem”, some should start thinking differently. Hi end wording of subsequent audible results, doesn’t provide a remedy.

FYI JC in a fit of rage over some of the comments threw his computer against the wall, so he won't be with us for a while. (Actually kidding, he broke his keyboard.)

I love hitting the ENTER key hard and speaking some @#!!%& words between PC keyboard changes

George
 
JC is not a sweetheart either. Nor he is pushed and dragged to post here. It is his choice. It is a technical forum. The objective is technical not personal.



Well, this “level of problem” is the reality. An MC or MM pre has to work with a given signal.
If the analysis of the input signal transforms it into an “unacceptable problem”, some should start thinking differently. Hi end wording of subsequent audible results, doesn’t provide a remedy.



I love hitting the ENTER key hard and speaking some @#!!%& words between PC keyboard changes

George

JC is a barroom brawler. He enjoys a fight, but sometimes even he gets tired of the same old, same old.

I think you misread the second part. The LF energy is a problem he is trying to address in his design. If it were not able to be fixed he might have moved on to CD's. Note however he has mentioned he finds some mono recordings better than stereo, that may be due to the use of lateral information only and less LF noise. (But who knows for sure!)

As to computers, well I'd get banned for saying anything more...
 
To show the effect of too few trials?

No, the experiment was to see how the student reported the results. (I went to a school with a very devious department of experimental Psych!)

Depends on your statistics bent. But the results actually would indicate significant deviation from the norm or evidence of ESP, even though the average is what was expected. Of course the actual explanation was the cards were marked and the subjects were coached to give those results.
 
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BTY,

Here is what I was up to today. Measuring transformer leakage both loaded with a small power supply and unloaded.
 

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